R04CPU, R08CPU, R12CPU, R32CPU, R120CPU, R08PCPU, R12PCPU,
R32PCPU, R120PCPU
with open front covers
1
G
H
B
I
C
D
E
F
L
M
No.
Description
Indicates the operating status of the CPU
module and the error level.
READY LED-ERROR LED status:
READY
P ON-OFF: Normal operation
P ON-ON: Minor error
P ON-BLINK: Moderate error
P BLINK-ON: Minor error (Changing mod-
ule online)
P BLINK (every 2 s)-OFF: Initial processing
ERROR
P BLINK (every 400 ms)-OFF:
Changing module online
P OFF-ON/BLINK: Major error
Indicates the operating status of the
program.
PROGRAM
P ON: Being executed (RUN state)
RUN
P BLINK: Being suspended (PAUSE state).
P OFF: Stopped (STOP state) or stop error.
LED
A
Indicates the status of the annunciator (F).
USER
P ON: Annunciator (F) on
P OFF: Normal operation
Indicates the battery status.
BATTERY
P BLINK: Voltage of CPU battery is too low.
P OFF: Battery voltage normal
Indicates the availability of the SD memory
card.
CARD
P ON: Available
READY
P BLINK: Ready
P OFF: Not available or not inserted
Indicates the access status of the SD
CARD
memory card.
ACCESS
P ON: Being accessed
P OFF: Not accessed
Indicates the status of the function being
FUNCTION
executed.
Upper front cover
B
For protection of switches, memory card
slot, and USB port.
Lower front cover
C
Cassette cover (on left side)
A cover for the connector where an extended SRAM cassette
D
battery-less option cassette is inserted.
No.
Description
Indicates the communication speed and
link status of Ethernet.
SPEED
E
P ON: Link up (100 Mbps)
P OFF: Link-down or link-up (10 Mbps)
LED
Indicates the data communication status
over Ethernet.
SD/RD
F
P ON: Data being sent or received
P OFF: Data not being sent nor received
SD memory card slot
G
SD memory card disable switch
H
Operating mode switch
P RUN: Execute PLC program
I
P STOP: Stop executing PLC program
P RESET: Resets error messages, initialises CPU etc.
USB port for connection of a programming unit
J
J
Ethernet port (RJ45)
K
Production information marking
L
Shows the production information (16 digits) of the module.
K
Battery case (on bottom side)
With battery connector (the battery is not connected when the
M
CPU leaves the factory).
or a
R04ENCPU, R08ENCPU, R16ENCPU, R32ENCPU, R120ENCPU
with open front covers
1
G
H
B
I
C
J
D
E
K
F
L
M
No.
Description
Indicates the operating status of the CPU
module and the error level.
READY
READY LED-ERROR LED status:
P ON-OFF: Normal operation
P ON-ON: Minor error
P ON-BLINK: Moderate error
ERROR
P BLINK-OFF: Initial processing
P OFF-ON/BLINK: Major error
Indicates the operating status of the
program.
PROGRAM
P ON: Being executed (RUN state)
RUN
P BLINK: Being suspended (PAUSE state).
P OFF: Stopped (STOP state) or stop error.
Indicates the status of the annunciator (F).
P ON: Annunciator (F) on
USER
LED
P OFF: Normal operation
A
Indicates the battery status.
P BLINK: Voltage of CPU battery is too low.
BATTERY
P OFF: Battery voltage normal
Indicates the availability of the SD memory
card.
CARD
P ON: Available
READY
P BLINK: Ready
P OFF: Not available or not inserted
Indicates the access status of the SD
CARD
memory card.
P ON: Being accessed
ACCESS
P OFF: Not accessed
Indicates the status of the function being
FUNCTION
executed.
Upper front cover
B
For protection of switches, memory card
slot, USB port, and dot matrix LED.
Lower front cover
C
Cassette cover (on left side)
A cover for the connector where an extended SRAM cassette or a
D
battery-less option cassette is inserted.
Indicates the communication speed and
link status of Ethernet.
SPEED
E
P ON: Link up (100 Mbps)
P OFF: Link-down or link-up (10 Mbps)
LED
Indicates the data communication status
over Ethernet.
SD/RD
F
P ON: Data being sent or received
P OFF: Data not being sent nor received
SD memory card slot
G
SD memory card disable switch
H
No.
Description
Operating mode switch
P RUN: Execute PLC program
I
P STOP: Stop executing PLC program
P RESET: Resets error messages, initialises CPU etc.
USB port for connection of a programming unit
J
Ethernet port (RJ45)
K
Production information marking
L
Shows the production information (16 digits) of the module.
Battery case (on bottom side)
With battery connector (the battery is not connected when the
M
N
CPU leaves the factory).
Network part
N
Refer to: MELSEC iQ-R Ethernet/CC-Link IE User's Manual (Startup)